{
  "manageEntity": {
    "action": "Save",
    "entityId": "1275789653",
    "entityType": "Track",
    "nonce": "0x8da2bb3295f0d8d1ecda21526f8932ecba14a7bc4f58112c1eb640ae04108772",
    "signature": "0x4345e544c21463fac18b46d83cef0ae925d39c56660e44e905491cdfc8fba19d64977e892b7a62a9978dfe864a6fdec613ae522d9e4a8940529a2c73f95c0a9a1b",
    "signer": "0x481d41B4b34069e19EDC206C160447ebA0841f6F",
    "userId": "854614078"
  }
}