{
  "manageEntity": {
    "action": "Save",
    "entityId": "1654763336",
    "entityType": "Track",
    "nonce": "0xfe0896f4137b4b2d22261a5653e5e93a9f5e8c9534dc270549c27dff8221462a",
    "signature": "0x0dac5ba44d93f07c2f960457a7f957bf9bb889d67edefc4bfbc34725675032a54b53d4eb12b22fb8102ff26206f9c75f9f3b28a856c6636a31ecab548ea4e08e1c",
    "signer": "0x375963f281CEdF4D9D180496F80A256D574daBa2",
    "userId": "981824750"
  }
}