{
  "manageEntity": {
    "action": "Save",
    "entityId": "422620045",
    "entityType": "Track",
    "nonce": "0x8e67df8bec2f205b81a0e2dffb499d507d5d384a75843b8a3d256e751c4db658",
    "signature": "0x7044414d8292c492b93e3122ef7ee1df2e7c0cb25003e56755e934a39a2817452670b151599122716b4cd56f24d6b01634c5287c4361a17b6d90d739ade3f8d71c",
    "signer": "0xE7D37531a757aEaf8B2c8037a79C03819edc20Dc",
    "userId": "870684573"
  }
}