{
  "manageEntity": {
    "action": "Save",
    "entityId": "159925386",
    "entityType": "Track",
    "nonce": "0x1c2ee8eb5fb4df543e236db911f7f7c12e203ebf7ada5a60d1a84d5d31a968e6",
    "signature": "0x1b31516466b6bdfa0c2f1921b1ecf020498d8149e727c7abde3ce9d994ac94b15a5af60b1d11ff58f435129280737eb941b8c4b45b13375771e9e87e2da823e21c",
    "signer": "0xE7D37531a757aEaf8B2c8037a79C03819edc20Dc",
    "userId": "870684573"
  }
}