{
  "manageEntity": {
    "action": "Save",
    "entityId": "1075336",
    "entityType": "Track",
    "nonce": "0x1d17e1f206670737e199217a10fc107c9eb5d38cae184d1e4125335aee33a4a5",
    "signature": "0x669778b2f5bcf29163d4a4bbadf0bf97ac34e1daa6dade30aed200dbcc5f69fe4e9371a34b2b3fad4759253a13ae3a793213192530b31a32c2a1f23cc287d1a11c",
    "signer": "0x44BAdCFCf42113CbB67f519e4efa576B336f9bf7",
    "userId": "136844578"
  }
}