{
  "manageEntity": {
    "action": "Save",
    "entityId": "1588875817",
    "entityType": "Track",
    "nonce": "0xf6bc01fb627d8ff0b38485aab92ce9b710a42a55a2b00d460f23e1f20ec438b4",
    "signature": "0x440e124615840c0723d0438f28f2cf88bd1e1bb099fbf6f3603696d5b4f6e3503b03c10d750b344630d9886919c7d3f67b11a1f0314082d1f96e516185e30ee61c",
    "signer": "0x7C2169544c0568cB3b210f320356B6A77E891F30",
    "userId": "495616082"
  }
}