{
  "manageEntity": {
    "action": "Save",
    "entityId": "1259038891",
    "entityType": "Track",
    "nonce": "0x7d6ff022a6da6190d689fc54861cc25665e131d7d8897682d433a65c8b7cabd6",
    "signature": "0xe0b82b96a07134b3d1ee08c1d79089566239233bb33d06de7c712ae307bfb4307fbed28dd6fe0859eecf8fd40a72f7b4e230e7befdbcfbb8ca66b4d3c04a16951c",
    "signer": "0x7E7b9c4DAC3F284d889a5bc274eA80b8BA5F63ee",
    "userId": "670307808"
  }
}