{
  "manageEntity": {
    "action": "Save",
    "entityId": "634636",
    "entityType": "Track",
    "nonce": "0xc5cc02ef6d651a357818ff660a382a69ebe972fa1b2186cac9b931e302d7af94",
    "signature": "0xcbefd1c6bef4980e10a6533670b01e423e97708014dd72e98baceb5c907326fb0b17abe8cf14d5a8e8864de5ff664d5049fa18206ac8973fb0fc3f3503c669561c",
    "signer": "0xC6f6979d7215C4611Cd7aDb30a42B2812294262c",
    "userId": "55290787"
  }
}