{
  "manageEntity": {
    "action": "Save",
    "entityId": "1829117008",
    "entityType": "Track",
    "nonce": "0x872fc26f918a1c9e88e91cb317705205fb6a7e97bd87702bf04cf5a77ac57bbc",
    "signature": "0xd2a80f43e656b073dd2dd070bd34dc8a9e8e1071c0c51087c666dfe34ace8e9b7a0f8e4c2c3497ed0e894e61257279b7268d0575cc08206cabbfc22aba14b7f71c",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}