{
  "manageEntity": {
    "action": "Save",
    "entityId": "992572",
    "entityType": "Track",
    "nonce": "0x82aea96b820a75865f81a15d21e4b992a930bedc89717fc27d16c6c27b92663a",
    "signature": "0x815cb666be56ef3142837e549dd6aa387592847a0288ace50b05ff9f137ac8a27533357f08193e0a26946986e314edb8cda4333a0a02fb74131937f4fdce53fc1b",
    "signer": "0x48997477d821e30d3Fa835d1Ee7809B3253Cb100",
    "userId": "75085"
  }
}