{
  "manageEntity": {
    "action": "Save",
    "entityId": "294542298",
    "entityType": "Track",
    "nonce": "0xf2a0fd75e54c6f642739513aa451a57724c16b4c00bf04c30c904248c486967e",
    "signature": "0x0debc5a5f4ef3c338d9b0eec1395ab0d1fb6577856f0c0d950c7bd78c45e19e37087243da6661abe53039b74078a07fa1b3b9d7363730211c6107486f6a5faf01c",
    "signer": "0x481d41B4b34069e19EDC206C160447ebA0841f6F",
    "userId": "854614078"
  }
}