{
  "manageEntity": {
    "action": "Save",
    "entityId": "1491903061",
    "entityType": "Track",
    "nonce": "0x8ff52624d4650f541d68939e29bbd05645cd260b3a1c78a00fd281c9ac2f7864",
    "signature": "0x260d9daf5b193fbfc87a93692ab6e22257fde9511c413adfe9b2cdce79b9a1e707d46114df818b732b29e3b2499c01b4380de843deee240d7022a0d477dc90521b",
    "signer": "0x44BAdCFCf42113CbB67f519e4efa576B336f9bf7",
    "userId": "136844578"
  }
}