{
  "manageEntity": {
    "action": "Save",
    "entityId": "1447979955",
    "entityType": "Track",
    "nonce": "0x678326c5c0057b6bce7a5005e6696d50185f0f945ffaf1298d1214be78724032",
    "signature": "0xc26c30b848c389534706bc34c467b4b62db162fe14daf3ff47a6188690a6d5505f2232b5b1b9f1e0d170f7d9a9ef0c5fcc889fe689f595b29c3de97e55c58d3d1b",
    "signer": "0xD9254B079e0e1571E56512C57188F2eec899054f",
    "userId": "854498636"
  }
}