{
  "manageEntity": {
    "action": "Save",
    "entityId": "696971394",
    "entityType": "Track",
    "nonce": "0xf923198d43ca2c72dfdf644a7ef519359a6ef334d2cd345e7c800f6a65bbc08f",
    "signature": "0x33b2c4a2aadc2483ff6c2cb5232284fad2cd43e211326a64ca2ba79df2ec8bc85aced1c2d47cac558724a671c503509d6cf7eda1b5cef5e8f75a8d69e54128601b",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}