{
  "manageEntity": {
    "action": "Save",
    "entityId": "1467088330",
    "entityType": "Track",
    "nonce": "0x10dcefafe13dcec5b3cc695fcd7c478752579ef709c629554c60490a515d0b48",
    "signature": "0xb849437b6602b046da7313cf4ab4311d3e193c2f7bc27e3c6f80eea80f8bbc7f16637a6a2732566339aa0e5aa8b2c93ea6dd38f837ef2afb838003db6214ea671c",
    "signer": "0xD24271e3B8CCFB603860EA392E94eD5AE2538703",
    "userId": "456716469"
  }
}