{
  "manageEntity": {
    "action": "Save",
    "entityId": "1635195811",
    "entityType": "Track",
    "nonce": "0xf512f01fda9814d18a95aec121e1692c4d65adcea5b777e4208fc0c40d8a8f60",
    "signature": "0x11096759bec4911a0fc2c80b6c2db281fef9abf733f86eb1f84adeb961ee726516c097d48c2c34f3b453a744c258a87a662c1f313245e256502162c890884fca1b",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}