{
  "manageEntity": {
    "action": "Save",
    "entityId": "1317369952",
    "entityType": "Track",
    "nonce": "0x28ec295d6bedb76ea028a3e6c4a398086677ce41a5bc4a74f4e5252f3bc91f7a",
    "signature": "0x9db116e04cd7df90573244cf19583db0c1277e2faf712463c65fb1bb067a1f9208abd954b07f232c7462fa9e0e71d792e5f83eb7950f793e02d0456617121aab1c",
    "signer": "0x7425EdbFdF528603A88c658f4cf8B1396a8a77F5",
    "userId": "406225571"
  }
}