{
  "manageEntity": {
    "action": "Save",
    "entityId": "1311812574",
    "entityType": "Track",
    "nonce": "0x4e959bc44c4ed078a13fca93576af627baddda9e8ea9c4005960da8a9218b3f8",
    "signature": "0x8442f120dabc76b5bd777b8df49afad68059f4d5990759d5e412690ada99839d03c1f721571fe2cfd1907cbf2d901466842778066909acee657b01db42731d841b",
    "signer": "0x2B171214e998033E806F72301307B2160CD94DdB",
    "userId": "489165782"
  }
}