{
  "manageEntity": {
    "action": "Save",
    "entityId": "665569",
    "entityType": "Track",
    "nonce": "0xa6410281dc33b3ec830c0ccdbc2bd8b486b987f9a3c1023084f2eebefce835aa",
    "signature": "0x4917ca80559da86964c7ebb8992220b528bf2755970419ca419be220c630da1878240853d7d86332c4429265a2d0ce23299b7b7374a4346009529b08c13337101b",
    "signer": "0x793bbEFbb3Cf1e6529B90296e502145aCcCDE8d6",
    "userId": "838777725"
  }
}