{
  "manageEntity": {
    "action": "Save",
    "entityId": "994694",
    "entityType": "Track",
    "nonce": "0x5068300ab7b8a5f92ec129250fcf12ab704d642ed56f94d4fe83ae678762fe0d",
    "signature": "0xd5c854836b16b90459176611b99fe04a0123e8c70cfc22494ae69d3a4de30ff4705af8df06ab1ca5396edd2b80d493b05313b2aebf2401e2a762048ee03377ad1b",
    "signer": "0x27204C77Baa4a510c92A96A4ba3661CC53EE568E",
    "userId": "35918963"
  }
}