{
  "manageEntity": {
    "action": "Save",
    "entityId": "1462493558",
    "entityType": "Track",
    "nonce": "0xb55c183e89bd11bb27936ab8a7a6fb0935a5642f5de61cd573dab36b8f61cca9",
    "signature": "0x2ea5f5961ea5c1ccb83b6cd0d42d1994b1a747f697b1087f227634ceacf737d42e9fff825c82ae0708bf5cdda8cc784c1a2df972f3afc01ed43b0dc4235821e61c",
    "signer": "0x6754A920da1003d0904BdFf228A6E217Cd12bF5E",
    "userId": "105562689"
  }
}