{
  "manageEntity": {
    "action": "Save",
    "entityId": "1581226774",
    "entityType": "Track",
    "nonce": "0x0944024922354d67b39a0c04477bac21122670f879bfad3878c810a87c8dd349",
    "signature": "0x5a116e6d01b3163e94d74b651b97dfcbc1ebd5d7f93a279c7d69defcdaee85c8699d42af2f10b90252068ab3870c1a7cb433a301c9a97ca2602fc3f91cb522271c",
    "signer": "0x262a2A1c96da0dFD6f33595c8D775BefA860d02e",
    "userId": "486490947"
  }
}