{
  "manageEntity": {
    "action": "Save",
    "entityId": "134412",
    "entityType": "Track",
    "nonce": "0x7c8f37639b1933dd769aa46a77e3a7b8d5f179b70c28ce08653e82ea207969f4",
    "signature": "0x312784cb2cfcb830b49fc25f36a9bfc234599d848f17fb3110397103da55779a5d9f6bd737e0279828cbe35056531060daf98941d82b849d697029e8e24f47491b",
    "signer": "0x481d41B4b34069e19EDC206C160447ebA0841f6F",
    "userId": "854614078"
  }
}