{
  "manageEntity": {
    "action": "Save",
    "entityId": "183291712",
    "entityType": "Track",
    "nonce": "0xa7f5b17da34da41867a8c228b57ab5e2fc932f917b685ae07c6d15f2f327a979",
    "signature": "0x0d0866e666e12950c2e58ddf46580587af33614fa53555c10b8586705df497277b93b860fe1a8267b2d4dce297d2c5d9f7ec998108bee3a05694156d5956f98f1b",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}