{
  "manageEntity": {
    "action": "Save",
    "entityId": "656223793",
    "entityType": "Track",
    "nonce": "0xd10eab4f6ec0b905934636bfe830562d29671acaa8b8294999e713540472284a",
    "signature": "0x62f734aaa38ddaa8dea868def18c57801d7b570a2d842bcfce055d318688755845f486e2b454064615d4d92c9cd2e6e158dbd9fa6b6bee28c9c1a153796597d31b",
    "signer": "0x7b52e6AA15Db4Fc3A84AFF2b12e5B8B128eA8610",
    "userId": "808512351"
  }
}