{
  "manageEntity": {
    "action": "Save",
    "entityId": "2026820689",
    "entityType": "Track",
    "nonce": "0x05b5770fc20c7e029cd41ce382be34fe6bf28eba2f10349f01e6cca1f63f80dc",
    "signature": "0x97db5cbb329a9c39da4aec2de6b463c5c5c8835551894e9ae3252b04171cb656564689586098a8a311b8f43e93427347f95d49be7f8041065cca4d532a41ec0c1b",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}