{
  "manageEntity": {
    "action": "Save",
    "entityId": "460282622",
    "entityType": "Track",
    "nonce": "0xe23fb6db2a0f6ec063b423fa17e78a88dda5c6320cbf65249fdf17923691044e",
    "signature": "0x3355218cbe2f63a6bb4bc30f8a635a5e8a3e612f79acb0ef51920c5ba46c85086dbc9c149372b54fbf506c3ad11f1a2421a058d942ad4ee6cee24bad2bb14e441b",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}