{
  "manageEntity": {
    "action": "Save",
    "entityId": "1223261598",
    "entityType": "Track",
    "nonce": "0xaecb9e1441f376513ba50ebd3d33845001c492b4cb39a32367531c447fb00eab",
    "signature": "0x0278c48e54cf23db597a3e029ac91868cd199c55ff901d1b398b7a3265416bda1e64d96aa183d2f96302386d7842b6cdd8aaa6d17f174206c235a6b103e2dc121b",
    "signer": "0x0685dE64d6C1DD2F4492DE8d4D836Bde25c77910",
    "userId": "392433914"
  }
}