{
  "manageEntity": {
    "action": "Save",
    "entityId": "1123166933",
    "entityType": "Track",
    "nonce": "0x8edc6e1e909e18e88889228a0b232815ca84a08ebc8ff9e23f764ec31663232d",
    "signature": "0x42db54bb179e4b73c8a4893c1eb84e0a79a76a1511448bb97ec7dbcefbdae2e86cc50504237f6ddd7a77779a5e69f740bcbc038c5f03fcb951f509d3045086c51b",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}