{
  "manageEntity": {
    "action": "Save",
    "entityId": "1939187855",
    "entityType": "Track",
    "nonce": "0x7994a3646a3449ade60dd4e250a8aa269515a1f87eee503c279f0d99fe749947",
    "signature": "0xe8fd14bf4eb34b891787c61b10dc391ce223fdc48cee5e87cad5d0c0dd295a8e76c935f583a91459197ffa0c4b10baf5dca83a1472a8460c4964d3a934df33d81c",
    "signer": "0x712Aca9aA6ac07F98dcEC338Be9C15c3Dc47d569",
    "userId": "12730129"
  }
}