{
  "manageEntity": {
    "action": "Save",
    "entityId": "134328832",
    "entityType": "Track",
    "nonce": "0x445040a538ebab18a64f67366385a8a304c22ea2092cff248d0f83e308a99802",
    "signature": "0x6212b92e9c2aa057a377921d7f1edc7b92e9bcd0f2538fe83cb8bc769c04ac7e013f38bff7a4eaecd08a9329d14b5f94f240af9a2f3bab253c16c557fc0c13ba1b",
    "signer": "0x0a5148A3f132E6696c1Cd3FDA8465fC5fF17d3D2",
    "userId": "803288761"
  }
}