{
  "manageEntity": {
    "action": "Save",
    "entityId": "1236431970",
    "entityType": "Track",
    "nonce": "0xa27ec21ceee4a0f3aa2a111d5ac10faadf63ef44e5e2bb81a8edec7b8d261484",
    "signature": "0x74aee0eb550009f817cbbf525214f3b5d1f7b7a87287ed5398d04788aee803d653bb49dae61d7460929bb1d2052d0815b05228474e87b484ff7fc23e5fea18961b",
    "signer": "0x5452f86EfcB1153FF9C10bdbe4103Ce25434D124",
    "userId": "620307004"
  }
}