{
  "manageEntity": {
    "action": "Save",
    "entityId": "2047690405",
    "entityType": "Track",
    "nonce": "0x6da544f805461b58124bd5a09c737654a81bdf544e0ec2a10882225f691cbf4c",
    "signature": "0xec6f62c74c3b1832308030e5e5e43d864903ac981416b5457edf89833b2521142204e43f3bf35a3fd4d025de51aaf15713d0e9086c6e85974a11a34159dc7f2a1b",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}