{
  "manageEntity": {
    "action": "Save",
    "entityId": "1683790275",
    "entityType": "Track",
    "nonce": "0xa4665f02e12174880367e0b222bb9577c42a0336a871cb29bae210c96e91a7a4",
    "signature": "0xe231b490536dc457e5581b878fd86a2672a0bb1bac350fa3e89bfd5c0688248a2c4b023bf2e6eaa41a7ae8778929a52018400025ed4130f00b859490f610dbcf1c",
    "signer": "0x1d868e2cc29848871636BdCF83a08A975835b6DD",
    "userId": "120328011"
  }
}