{
  "manageEntity": {
    "action": "Save",
    "entityId": "291616",
    "entityType": "Track",
    "nonce": "0xdfdcea36aebcd2a5c112db1a980c0c8f916f23611f3d626d32bbf40038435919",
    "signature": "0x2e0e9bb5ff8c96e8ee982aedcfb0942aac55e442a3812ee0509e460a121c8c513ba0824267cb8421609c2b0775b6e8fd96124f88e92bdc1f678b2233567923bd1b",
    "signer": "0x6068Da6B0a791A756931bE32de98D46eBb95890c",
    "userId": "475275462"
  }
}