{
  "manageEntity": {
    "action": "Save",
    "entityId": "1150000039",
    "entityType": "Track",
    "nonce": "0x67e4f755c1f67144285e4c707c0b6e9d3fb15d8b4d214ca300d400ab47622132",
    "signature": "0x53760ef2dec4bb0234385639c8281ffd14f14505c659eff45fa70d47a0c63cb6033bcfa00e84e670d0a76afc0875eef828287702e26cebf26497ff1fc62bd8281c",
    "signer": "0x6068Da6B0a791A756931bE32de98D46eBb95890c",
    "userId": "475275462"
  }
}