{
  "manageEntity": {
    "action": "Save",
    "entityId": "1628445687",
    "entityType": "Track",
    "nonce": "0x76b484d3fc846f0423f549213569751fe618756bb236d34cc4b8708278d4e8a6",
    "signature": "0xd07c8949ed62e3d5f50dbf851ecd6cbd17952ef28d41207c5ef991e9f584045560b689eaf6c610010319849ed4f8f83b907a4325dab4f6d62093a6252d1253a71b",
    "signer": "0xAf1f176E32866fb97d822F6f5222061aF11ef652",
    "userId": "954117045"
  }
}