{
  "manageEntity": {
    "action": "Save",
    "entityId": "766729865",
    "entityType": "Track",
    "nonce": "0x3aab4080d73071150212a162ff263359929c8a41d1286580f7cc57662496a926",
    "signature": "0x67111edf026124449e8a357a3aae857c292f12cdcbbcb570f07736d94868818d6f3125e9765fa37ee19a35a7d6a9757c0e988f2d4520260c880c789a1f148e6c1b",
    "signer": "0x0D2c1331F52a98aF1Bd206E3C28062E717CA9E51",
    "userId": "597927803"
  }
}