{
  "manageEntity": {
    "action": "Save",
    "entityId": "1239637790",
    "entityType": "Track",
    "nonce": "0x71dd9c00a82e586c4d7a12d00d024f9b4e3f552a7a117866fd903f2181e130b0",
    "signature": "0xdfb9bd5302c03fe0d59a3beae608fd7490a41dc85f1029aa1dd453645dbb205c0443d8427df9927f9a27039f4836551c5d198a42019e26e31c48f711bbe7d9671b",
    "signer": "0xc00163EC4A1f48C70D0b676b7F5c071142de6C02",
    "userId": "227991193"
  }
}