{
  "manageEntity": {
    "action": "Save",
    "entityId": "319053",
    "entityType": "Track",
    "nonce": "0x44d3e2efd62bbffdee764204c5d985493d642cb4430959ed560e83e8f1a9da40",
    "signature": "0xa6bc7561e48ba8663f3948c15971b052dbd0a1cd7324d54843379424ca6a34aa44c4e21ad7f3d37cff41702e73cf32af741e356fd77f389c57115aea9af77d561b",
    "signer": "0x0fe82f565AaE260D57b8e691c61Fb05fE83B6F81",
    "userId": "614212580"
  }
}