{
  "manageEntity": {
    "action": "Save",
    "entityId": "915462503",
    "entityType": "Track",
    "nonce": "0x11fe6ed90dfa344af40d6c09c48abd7c86aeb0754f9ef9edf61ab8220d73adef",
    "signature": "0xc64e391e57a7bafc9caeb986aa3b83f55c06be7737a4a0523b7f89359f7da5424cf3945119bbebbc696d202a8da5fe4184e741c0587b1cf335ca8b5795d5eab41b",
    "signer": "0x262a2A1c96da0dFD6f33595c8D775BefA860d02e",
    "userId": "486490947"
  }
}