{
  "manageEntity": {
    "action": "Save",
    "entityId": "1141868327",
    "entityType": "Track",
    "nonce": "0x91d9bbda5c9e35d07f6d295dea4e0494185b51e26b5f7556a52bcddd6aeb72ca",
    "signature": "0x13842b414c3a167f9633af83cbc556092cdf456966850422e3f9ea818c785f282f06ff7ce4a8df2b138a5dcf0e5c78dcce7076d0674603fc1dbc9a2e9c98965c1b",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}