{
  "manageEntity": {
    "action": "Save",
    "entityId": "2000682582",
    "entityType": "Track",
    "nonce": "0x8710a03bac9b5b0ec252380991b6e504fc3d8dcf0f7349adcc79d3dc662d3f38",
    "signature": "0xe30aaf95e79580a79d0b01e19bbb599066c328f688b274c72baccd039aebadc1033586a32e76490f887fd4debf27f2d2474e4fe9701191ca7a1e8fc384388a361b",
    "signer": "0x3939e302479fE0F42271820cd8E0b44A47273209",
    "userId": "540529323"
  }
}