{
  "manageEntity": {
    "action": "Save",
    "entityId": "764770703",
    "entityType": "Track",
    "nonce": "0x3d261bbd95f1f7afdb9b3215b296f975914d392a6bc97acad689633a4b81323b",
    "signature": "0x5d6b8d8b7a1ab56796e875bb0a8127cc4fff62af51f419faf3577d407b310a287e281be06c78c3bc2b117dc3a4dc8323698b0157fbb0781a883a7b6fe3cbf82a1b",
    "signer": "0x262a2A1c96da0dFD6f33595c8D775BefA860d02e",
    "userId": "486490947"
  }
}