{
  "manageEntity": {
    "action": "Save",
    "entityId": "852017529",
    "entityType": "Track",
    "nonce": "0xb45c9ff15dddb08a6972d4a72013832423d0f84602a75ead8834fc439be63b11",
    "signature": "0xc98aa49456a05afecb1dc31d56416af3533ec05e469b47a09e01d9893c1984b67cc0f708950f4a66963b9af3ac334202d34b0e2a4d87945445ddfd892e6dddf51c",
    "signer": "0xF08935327AeC6306C8d0eb92999567e5496848C9",
    "userId": "989073793"
  }
}