{
  "manageEntity": {
    "action": "Save",
    "entityId": "801188",
    "entityType": "Track",
    "nonce": "0xe919458b65c08a1e11cb52f4722560d623d8a483c7af0f6e6c333b2ad172a5ee",
    "signature": "0x42400748e55d77c70ed0331b6e3b66eada1855116cd1d4a358887f71e3e070a33811e4e2f6a7ae45a979d34fe0f480265d16497777e0185dd5e90b566dc201791b",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}