{
  "manageEntity": {
    "action": "Save",
    "entityId": "265437523",
    "entityType": "Track",
    "nonce": "0xa818cdefe58b4b05e1ce249ce1cdb5d65f48b6caff251e1157c02d2586503b6f",
    "signature": "0x38f7b7cf425647dea8bf7affcc77b8d4dca0c94289ffc6c21b2d452ee64345db1793678502a85eb099992e03efab640f45fd10dda45490e3084c95bab90c3c281c",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}