{
  "manageEntity": {
    "action": "Save",
    "entityId": "791464114",
    "entityType": "Track",
    "nonce": "0x9469e5d25d0966143265e93cbda81cdb71f9ff048eecf61a8a242e0559a29cc3",
    "signature": "0x23aaf67541d92f00b2fe9b5cdd01587cfef0cf2fb4587bd4b4a2e7491c0bf8fd5fc12f5bb2a4c75997e1573f29b9d32b83e35b7eaab5adb216faeb48f449e01d1b",
    "signer": "0x5fa60F185681545769de01098bB8F29cfbaE3cF0",
    "userId": "489026160"
  }
}