{
  "manageEntity": {
    "action": "Save",
    "entityId": "1755875049",
    "entityType": "Track",
    "nonce": "0x880208f282db5300dd8803b25534394fa1fbe37b773970d63af1c724ccad3d88",
    "signature": "0x4dc7e3aa2a4ed8ff649984ee04d8ab9b719a8737bea2cd9adba5f926510097a8035c94f3d32750e56ec7cc37043222d53733f7688b2f3088f8442d417ca19ca11c",
    "signer": "0xbbB98413eB671bb0000F0b18A2A7Cae9631043E1",
    "userId": "98311147"
  }
}