{
  "manageEntity": {
    "action": "Save",
    "entityId": "1378604348",
    "entityType": "Track",
    "nonce": "0xe32932eeb705d418dcc3d8516c7ec8561efcae8ef8973279f9bff94e485f3381",
    "signature": "0x925d64827401ccf69b91ac745b3e385aebeed844e8aa0eed82390042247e6b3e0b93cb3206f042f80294bc5d5c8dadb81ab8df523c166eb78775abed925f80dd1c",
    "signer": "0x0E71C12c426F5C9206F778713f48B60477CA943b",
    "userId": "29088079"
  }
}