{
  "manageEntity": {
    "action": "Save",
    "entityId": "1677224463",
    "entityType": "Track",
    "nonce": "1792308385821243183",
    "signature": "0xdb6026fdd430a377f161e65a6eef7ef369533bd78c288eeb7fb4162f7bb8a057733fc42acd502146e3b243226c2aecc68883a7bf4bb9727e2ba03c67ae47fdf01c",
    "signer": "0x6620103988B969bE5810F1B5530c1A44Fe6048A1",
    "userId": "568518925"
  }
}