{
  "manageEntity": {
    "action": "Save",
    "entityId": "160453661",
    "entityType": "Track",
    "nonce": "0x5e1b924355ecfa20d1573cbe29fcbd9bee57b6b01475703ef805791ade27eb57",
    "signature": "0x6504274fc860488eefd32c9921d5ba71e1a82093b43722315aee4676d242ed8947b9df3ed44091aaf3e2730c7bc901d46214ad5b0efed6964236c4dc11f66bcb1b",
    "signer": "0xD24271e3B8CCFB603860EA392E94eD5AE2538703",
    "userId": "456716469"
  }
}