{
  "manageEntity": {
    "action": "Save",
    "entityId": "1200880330",
    "entityType": "Track",
    "nonce": "0xe5e18520fb5d0c33c06a15ab850aa93dc89dff7cec02c6318a8ed6e4029effb0",
    "signature": "0xc35a630065f8cab6432faf5e0f364f445d063c80e21525437e604daec2753dd453a041d092e07d15306188aa43d10ff529e01ea80b98718d44bc9cc7ce3c96ca1b",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}