{
  "manageEntity": {
    "action": "Save",
    "entityId": "671409767",
    "entityType": "Track",
    "nonce": "0xbfe3e72be5fd18935c45ff26187d8a72188c749fcc8869d6a2ef40b056d8281c",
    "signature": "0x96bb253ed4c82184b001c8b52aba93f4804b2dfe16e0aad0e16f8c9e94477be54e1c5df5fc35b9825bf1f68d51ea373ffb9921c1b1e6b93fba712565cd5e9b751b",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}