{
  "manageEntity": {
    "action": "Save",
    "entityId": "1918695140",
    "entityType": "Track",
    "nonce": "0xdab7cde728109ba4d461259433d2457ba15ec5aef85195a7495d0a7fb236896d",
    "signature": "0x596efbf911b2fc254ff9a11440181d23df2b1bb3f8eb5ae0dde74fed1792a1ad3026a17e30af637a095501c27accae32d1c4d6fdd09fd68571fff7e9607257451c",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}