{
  "manageEntity": {
    "action": "Save",
    "entityId": "1204741981",
    "entityType": "Track",
    "nonce": "0xec4ee9f21715717756ce5e3bc6c67de8ec34b2b33749270563c6b902320e2d96",
    "signature": "0x0ac27ed7cd54da7d09b58b7802bb96fe48c7b98a7810837aef9a9aad0ace951167285745aaa10c857120394bb3aaf4793e909ca9337acad185ac40da7ae2dbe51c",
    "signer": "0x87FC3581f96D45b347BB39E15f25079950C5Cc27",
    "userId": "339826419"
  }
}