{
  "manageEntity": {
    "action": "Save",
    "entityId": "1408934588",
    "entityType": "Track",
    "nonce": "0x09e87ae6a4364859d48ca23ef8b130c98199622ccc3400a3d187e8027da7843a",
    "signature": "0x839a3ad70fd01c08a622d073e055de1dc7c13fdaea21939d4dbdcc170254de1015a4c6364ab6e1d2132124426e38e71ea970e4381886fbaa129749e8be10e8ba1b",
    "signer": "0x0fe82f565AaE260D57b8e691c61Fb05fE83B6F81",
    "userId": "614212580"
  }
}