{
  "manageEntity": {
    "action": "Save",
    "entityId": "1402679627",
    "entityType": "Track",
    "nonce": "0xf6ea8b0d823f18c80da2c1a597c15ea6bb7ce6b248311cfb41f53dc40b4a2bb1",
    "signature": "0x7531f853e68aa6f8e613f6074fbaaab54053f707605acf738f59b4e4775d1e1a6bb09212209618dd3ae981940bdecc1ac750e03ccaa5edbb42017a5cbd1ff8161b",
    "signer": "0x5fa60F185681545769de01098bB8F29cfbaE3cF0",
    "userId": "489026160"
  }
}