{
  "manageEntity": {
    "action": "Save",
    "entityId": "438158",
    "entityType": "Track",
    "nonce": "0x13eacc7f8110916fdc31a4d249b42172e22cd1b18947247e7271bb5852a5f043",
    "signature": "0x1ffed18cb71959a63fc7a71ececbea103af6b6bf425c9d01b079213d162a4a960335eb05ef62a4c60f2f91033b985751b35beaac263b1c54c7e59068a4a19e821b",
    "signer": "0x0fe82f565AaE260D57b8e691c61Fb05fE83B6F81",
    "userId": "614212580"
  }
}