{
  "manageEntity": {
    "action": "Save",
    "entityId": "871727340",
    "entityType": "Track",
    "nonce": "0x66af8b830f05ad02d96d55d84186507a0368888aeb6f273495c0125ce6d888eb",
    "signature": "0xdde0d617a15c9edb7187011ba9935608fb2e19e8533c302cb26f18abc6f0950a5cc80be5a5ca1bab2247d8bef5c0d72bc7a07d6958800b2efea0521b6c25d4661c",
    "signer": "0x5452f86EfcB1153FF9C10bdbe4103Ce25434D124",
    "userId": "620307004"
  }
}