{
  "manageEntity": {
    "action": "Save",
    "entityId": "1837383609",
    "entityType": "Track",
    "nonce": "0x75ef98b450ec97660f58d6fc83f947ea4abf98ffc9902be2325f5b1829d36064",
    "signature": "0x00213a5f13c7ba41ef1435c9d447dbde1f52d610b6565c610d683e8e33c648d43c27eb517120b118eb6e60d6fdd715ea60f14db4672614aeeeadf129fb723baa1b",
    "signer": "0x84B42609E987DD0953e02498E61987fB833B7C92",
    "userId": "887547386"
  }
}