{
  "manageEntity": {
    "action": "Save",
    "entityId": "1754759934",
    "entityType": "Track",
    "nonce": "0xfd207c86928ae3da6f9494224bf33525eea0e0c97d80ea1f8a95430bd0a4e59c",
    "signature": "0x3a0132dc68263cb58d898ef5875da1c7d76e8675559c663c30a7e21a10e7a9aa27429d7cde7408915e924d76bfd967d507d4f6fb91345904a77c7879746361a01b",
    "signer": "0x44BAdCFCf42113CbB67f519e4efa576B336f9bf7",
    "userId": "136844578"
  }
}