{
  "manageEntity": {
    "action": "Save",
    "entityId": "1633170843",
    "entityType": "Track",
    "nonce": "0x925c23493a42725acbbeea317f36a47e7d6bf1fa76fd800163f528711e39a56e",
    "signature": "0x70310a0ecfdbf4c55c4e17eda65dc61d5653ba01bfbed2e65bf781a9edfc33121e42bd5023efa154b115e0e74bc44d02b0b7939a52c52a9e62e7dc629eaa24411c",
    "signer": "0x87FC3581f96D45b347BB39E15f25079950C5Cc27",
    "userId": "339826419"
  }
}