{
  "manageEntity": {
    "action": "Save",
    "entityId": "129043923",
    "entityType": "Track",
    "nonce": "0x718ad0460b5d94e3d36ae795104e863bb30fccbd2f219402c4514022192e38df",
    "signature": "0xfe904d54c08ca195a9b614646f58e14a405b8801ac67076cbf28f4a4c9f601004242c89e197d83c8547d6789b95a4dca24839df27220a3b8d45ddc70c28313831c",
    "signer": "0x5452f86EfcB1153FF9C10bdbe4103Ce25434D124",
    "userId": "620307004"
  }
}