{
  "manageEntity": {
    "action": "Save",
    "entityId": "729966080",
    "entityType": "Track",
    "nonce": "0xbcb6185fc23dbf0c7faf163459f64f5e5c9ad94c9ec98ab42bdf7407b83de2a6",
    "signature": "0x5df913ffef644fd4f87d9e289feeb399e3b71d5eb4923664b83123c72f5ce12a3f72c80c06ebfaf79045fc2716867c037301355b1e132db07dd57075286bdf181c",
    "signer": "0x7B3AFAc08245Ef9d1CFfF7f7cdDBCAADE68f94E3",
    "userId": "230426"
  }
}