{
  "manageEntity": {
    "action": "Save",
    "entityId": "635455928",
    "entityType": "Track",
    "nonce": "0x0ce36e43d0f02ca1041645ddb64ffc272539c26f1e713f2b58a8c19868647440",
    "signature": "0x638cbfb7c8dc3f86189c935ee7ff62f15bab77e21409f74be349f698042d129101ae9df2f2f27d1f1c2952158570ce678b51b5fb418a6c971682ea75c58fff761b",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}