{
  "manageEntity": {
    "action": "Save",
    "entityId": "1387115224",
    "entityType": "Track",
    "nonce": "0xcee48b967cf5ce91603c58efba724e846ea0e2ef24d6f1dcf8b3e990f7bfa7f3",
    "signature": "0x011c78e4cca6a7429c6fe9eebb057c57284682e69089f219df4ad2013aed0a642d01a2d1193ffc0e2218ded448329fb1eb504b0930718d836f191edd9d10318e1c",
    "signer": "0x481d41B4b34069e19EDC206C160447ebA0841f6F",
    "userId": "854614078"
  }
}