{
  "manageEntity": {
    "action": "Save",
    "entityId": "1244393010",
    "entityType": "Track",
    "nonce": "0x898b4d0703ba4c93c1a0e62c6c1f9abde68c7e0430297573d5bcb2f6f05aba70",
    "signature": "0x36acb9ebd4f979584e62ea518e99857da3865c0e56963b65674e637ecfd593692d6181bce48ff3b4d18def19d25eec614afd9be80d3c80ab36e1cdf84dc49e4f1c",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}