{
  "manageEntity": {
    "action": "Save",
    "entityId": "563248091",
    "entityType": "Track",
    "nonce": "0x51bddb45d97885b35cee0546a1dbc426467e8b5b63c5c8c170905cc37bd0435e",
    "signature": "0xfe247dc6359ca9b25674d3f2ba5226839750d22d228c736a92941f41853898e62021431222734aa192500b10d7a6a37459bc8ca5ace9ce64e75215ef4835259c1c",
    "signer": "0x5fa60F185681545769de01098bB8F29cfbaE3cF0",
    "userId": "489026160"
  }
}