{
  "manageEntity": {
    "action": "Save",
    "entityId": "1216634812",
    "entityType": "Track",
    "nonce": "0x63b570632be8ef116930bce72caa1abf028e6208e133bb0719b9d5d9beff09b8",
    "signature": "0xee1b22adac2f5fc4a5dfcbff86c9cb35e06597f84d3d9bb2c7e3da91dff62f07109dd95b0142e8425ad1cddd908320aae3457a7a678de913709a1fe4381452461b",
    "signer": "0x262a2A1c96da0dFD6f33595c8D775BefA860d02e",
    "userId": "486490947"
  }
}