{
  "manageEntity": {
    "action": "Save",
    "entityId": "402947",
    "entityType": "Track",
    "nonce": "0xaf80f2947a74d70c75ed0f540ca2ffc988b9a4bdb88c53c7dca32681c7bb3677",
    "signature": "0x5e302878811bcd684731a1ede4acc4348e0b7998bf6d553ebeab46584d4c7984711e9f4c2c281924994b0dd1bebb23f01a42f082bda213c700444d2776cb3fce1b",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}