{
  "manageEntity": {
    "action": "Save",
    "entityId": "1502968081",
    "entityType": "Track",
    "nonce": "0x5ad8eb6b78dde13aec8b9d52b7832fd5710c38d2ff5937f092a7853d72efee1b",
    "signature": "0xacf2c1310493acc5cc406b4f6424745974180bf433a916662bebda4e428873d742e8596ea28e5aae99d0957d2cb7deb7ada112d73b158f66ec199b5d7641de531b",
    "signer": "0x15619939a23dCc91057A5885dD1B5a6aD55Be3f2",
    "userId": "779576050"
  }
}