{
  "manageEntity": {
    "action": "Save",
    "entityId": "1366068978",
    "entityType": "Track",
    "nonce": "0x039c76e0869758ad5315f82dbfe16f17fc94c3ea7230d20ae37852219cccbc98",
    "signature": "0x10321597fab12c6f6d2e3451a7f79bf0404c0664fee70f2a266f74180954c5d234d8e26c883b65d40cbde36c7c574d3e72bbdaa1c1e1c352edfd7ba6060392781c",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}