{
  "manageEntity": {
    "action": "Save",
    "entityId": "547978864",
    "entityType": "Track",
    "nonce": "0x92206af87b0bae2f2b2e3053081c0a00353a33d1123c39310a96f36c055f9f89",
    "signature": "0x58a83f3af8870fff9fa45e129dd409100189a3a825778188beb227d8356e047e6e6a2e16ca6dda3cda33296d08b9398c8a581ffa13a091fb580f449e9f7522bb1c",
    "signer": "0x2F87bb373089af6C75e3362077A0E52A4779f72c",
    "userId": "582715056"
  }
}