{
  "manageEntity": {
    "action": "Save",
    "entityId": "189027",
    "entityType": "Track",
    "nonce": "0x7f1331ccc93989613c9f41983c58f107855353b45850df8da3991f8f1fca0f5d",
    "signature": "0xc4556f52bc89cc47019acd052ca0b108549dc7f206799deb2a1ba3757c519a13366e354eb59d39ae309e76a764811aedcb9156b4116846d60194238ed3496fa31b",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}