{
  "manageEntity": {
    "action": "Save",
    "entityId": "2072376098",
    "entityType": "Track",
    "nonce": "0xf1df9f4f07f8d10c1a3e267b15d73442b9fe03e37a71221a13c469698d38a4d2",
    "signature": "0x562aea9e8a7154e8b7df92e8c46ff7ba96445c53e1b2b89af6e87f5d50724db2190bfaa8ec94addc7be21acdfcf285f8682aff719272a27fb6586581aa87ca951b",
    "signer": "0x5D012C880480A2E1ab4345f6F374CFf73e040331",
    "userId": "10449019"
  }
}