{
  "manageEntity": {
    "action": "Save",
    "entityId": "1722852873",
    "entityType": "Track",
    "nonce": "0x6e307079c9c8b4dd285bd943a7e5dcc57512754a32a317bdb4300408313e2793",
    "signature": "0x5c253aee28b4771c2b76f2a7416f7c5f3845e6e3bfe676eb9621ed331d441b626447f1e01f98783836c27d5a150f2e1e3f09da2c314ae3df0e150b6da723008c1b",
    "signer": "0xA66d5981794A5e084FBD9adBFF28F465924fb9a9",
    "userId": "980224167"
  }
}