{
  "manageEntity": {
    "action": "Save",
    "entityId": "756057004",
    "entityType": "Track",
    "nonce": "1787258343391622146",
    "signature": "0x2f3a9966faddc08a88f90ae363ea740d5d24c90df627df8c997335e0377ff10b44761909d86e5c91f33f00a811c83912bbffde9f918e631f1380a2987a0cfe231b",
    "signer": "0x6620103988B969bE5810F1B5530c1A44Fe6048A1",
    "userId": "568518925"
  }
}