{
  "manageEntity": {
    "action": "Save",
    "entityId": "1556330613",
    "entityType": "Track",
    "nonce": "0x631a0af772d9073228f10f3758aecaddf8d8203082d0817f4245d4f4bf07adb6",
    "signature": "0x317f957bb6da1a52d8bd458d6bb9ad885e94e35aac007182067a56b9ef930e050969df6f0f226c43aff2301cfaa18d0a5f6b48adbf26a9ef7fdfbf349ec96e101b",
    "signer": "0xd14727622fa26ECD6Ad72cADB6b96823f5fb65DD",
    "userId": "173494086"
  }
}