{
  "manageEntity": {
    "action": "Save",
    "entityId": "1071388332",
    "entityType": "Track",
    "nonce": "0x1b5f0b07ed97249fd377f0f62864bbeb095310b122c922123f2631e69cffa8eb",
    "signature": "0x0fb84812e7a7a3ab729d909a7a556f8cde94ddc0be3041d517d96297b04e9f9c5b37a431ef7016385b5f5c2c585f059e30f87cee16d081c314a3aa58c5a539f71c",
    "signer": "0x7451Cf52e883bc4483b88591c194dc3942E7F191",
    "userId": "584186978"
  }
}