{
  "manageEntity": {
    "action": "Save",
    "entityId": "27177670",
    "entityType": "Track",
    "nonce": "0xfa4b9e23e6e1b4f751e6a92a7fd5f45e08b8f2c911a0e715e84c80532d0069e8",
    "signature": "0xb153a2c47a17013a57f086a6a6e1382b8141cdaf174cfb54e0106a8b1f72fd720121265ef62ece6f4b6c957726f6889878fed55dc13134383671c794f635cd4e1b",
    "signer": "0x65b2681094e762CAD2349e6C1e2FbC8d54b9c046",
    "userId": "11153747"
  }
}