{
  "manageEntity": {
    "action": "Save",
    "entityId": "655128647",
    "entityType": "Track",
    "nonce": "0x242e0c9f3ddd7a396dff2a75ec76f8590867e7700117ce9fd18ed2ac80d8c6a4",
    "signature": "0x9d9a56dd53f466eaa5ae3b7c92f2c1d7f25e35a949c201b46fcdc9435086b6694f6dbfff482820e5a1af08404cf79a597a661a1e24ebf1e347cfc57d4aed9b101b",
    "signer": "0x4993C3631eecd6e8c1635351A99C2103C7d6Be4b",
    "userId": "906184213"
  }
}