{
  "manageEntity": {
    "action": "Save",
    "entityId": "2071464173",
    "entityType": "Track",
    "nonce": "0x74349a6f84c541fc0d3ebed19e21c7665c82b230ea05f22bb2fb341361fe73f1",
    "signature": "0x51b9669cd9bac32413cb3f41026e3d1b7387efc733c3cf7551b32954a0a2aa3015605d2ae2de6e95fee94b33d4124622b469fd387743b2904c63c40a60d5f6aa1b",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}