{
  "manageEntity": {
    "action": "Save",
    "entityId": "258743445",
    "entityType": "Track",
    "nonce": "0x24bdf5010925e4886fcb83bae297af44ce2f2f071b46a3343a7592ac970b92e7",
    "signature": "0xba26190219e429b9a16cfaba1341a7973ed267365c78e88b4ceba49ee80db13910368b2408a732165df8f7588a7089f25353d78ad16d516011f03d731879dab31b",
    "signer": "0x0fe82f565AaE260D57b8e691c61Fb05fE83B6F81",
    "userId": "614212580"
  }
}