{
  "manageEntity": {
    "action": "Save",
    "entityId": "2005288419",
    "entityType": "Track",
    "nonce": "0x0b0c45aae8c9c199eddef1dd20617f379f46014908b4988e1518141cc50c1105",
    "signature": "0xdf8e9c8cba4cbe842401995a08ed188a9d80e5d916e2bbfc451cef7f332694e1618cb9bc1cb328f5d77452f5f0fe11edd3b83d945f8e1e087f4b4f8c55cb35531b",
    "signer": "0x5452f86EfcB1153FF9C10bdbe4103Ce25434D124",
    "userId": "620307004"
  }
}