{
  "manageEntity": {
    "action": "Save",
    "entityId": "1412450744",
    "entityType": "Track",
    "nonce": "0xf3c96a4c949e16b41e71790bb0d2ac0fbf55ba05a1aef85d54c3fe2b9cff78f0",
    "signature": "0x2eab32cd5594b66b448605af786d18f75ff118cb78387c53c4a65108241b9efe692e347a0604af7074092057164dbbdd78b975de622c1db6bda77ec73dd7c8881b",
    "signer": "0xA27B00F57fC7B3E81c4d7C4919aCec97E1fCf667",
    "userId": "329513359"
  }
}