{
  "manageEntity": {
    "action": "Save",
    "entityId": "1835478010",
    "entityType": "Track",
    "nonce": "0xa15186585fc86b7af5aab32e76e2e29bff981a2535e4b7d35f951dd4e9365a1a",
    "signature": "0x8562d5fbc1053e90a4d573c378af12eb63869a572af72b638804307c8cc6135e70e56efc908beaff08c57b21f1dde22b640f40f3f52801e79702859cb40f69401c",
    "signer": "0x9436FA87F6c8C3aa9e0F0fc7960566dEeB9e23d4",
    "userId": "2047015"
  }
}