{
  "manageEntity": {
    "action": "Save",
    "entityId": "445233",
    "entityType": "Track",
    "nonce": "0x34ea495794ba44b1f552652925cf826c616517bf858e71ea22fb041cd624b219",
    "signature": "0x4d1907b3bd035ba0cd5f99961c944517e8dba40b62ad4f8b6865d169fc7d10e120e444814815d240265e5c868ce0d95cbcf3da0171e0e270fb7f9c1336e20a2f1c",
    "signer": "0x6068Da6B0a791A756931bE32de98D46eBb95890c",
    "userId": "475275462"
  }
}