{
  "manageEntity": {
    "action": "Save",
    "entityId": "1174155951",
    "entityType": "Track",
    "nonce": "0x6a14ccff0e567e3612b5ed682cc0b9f98dae0ec47cf1739d0fa1966dd9a2dd54",
    "signature": "0x23dfb1e6c5b4d0fabc72767b61938be351ab7d8c48b8523735481ac7ecb4af5c069a5e191707ec1403e1087ddfdc8449a724f0917274c346625bb5fa20f6cef61b",
    "signer": "0x481d41B4b34069e19EDC206C160447ebA0841f6F",
    "userId": "854614078"
  }
}