{
  "manageEntity": {
    "action": "Save",
    "entityId": "493569",
    "entityType": "Track",
    "nonce": "0x856dc7b571302ea8522acbfa407f0602ca6f2de00428ed02d348e31e6a7ca2e8",
    "signature": "0xd6db968b025decf4f618a7e96b160631e30b763c209751c9f058fca1f087df0c620aecd92c938a186a4d9a8a3fc3eb87d32faf344c42232a61e475303ae149911c",
    "signer": "0x0fe82f565AaE260D57b8e691c61Fb05fE83B6F81",
    "userId": "614212580"
  }
}