{
  "manageEntity": {
    "action": "Save",
    "entityId": "1156539338",
    "entityType": "Track",
    "nonce": "0x1bbb5618e64e14fb07115306e76af342d4ecceb8f22ff062c26809e10062b9c4",
    "signature": "0x232c5f3a5795029ac6047e3fb4eab2ba9c2b78e3384504141bca6f8b708c963a08f1e746d04f5badbe79ee75dcfb2ab04f1b0d224d7442329349de171a6d2b801c",
    "signer": "0x7425EdbFdF528603A88c658f4cf8B1396a8a77F5",
    "userId": "406225571"
  }
}