{
  "manageEntity": {
    "action": "Save",
    "entityId": "1150398847",
    "entityType": "Track",
    "nonce": "0x4a0c4c4aa81dbdb7f300f740ebab1ca6b541b5de52227bb03fb7321e966d5988",
    "signature": "0x8b472df4a3a7c47c612156cc62b9e8e985302a94c849ee7d19b1605f8dd7b23463e2f7e713178f9d73369908625ef653eccfa05209ba64f26aa1045aa6ecf1541c",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}