{
  "manageEntity": {
    "action": "Save",
    "entityId": "977367028",
    "entityType": "Track",
    "nonce": "0xb30e5f425df67680359095e639426ddb98aabc27f80562d171085963dd5e2b44",
    "signature": "0x6bb13e2623842ed65df0dd460ff035f972732c9927bebb016419a921baf51f8a027cd9e803f10ffe9718b8d4a6748b2df8615e29b269e5cf28e1ca422a79f7d11c",
    "signer": "0x481d41B4b34069e19EDC206C160447ebA0841f6F",
    "userId": "854614078"
  }
}