{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "152450",
    "entityType": "User",
    "nonce": "0x59743aaad2fecbe80dec7bbfc89665ca02aaeea952dcb4602c09fe275ed492ce",
    "signature": "0x4545164c2d4fabda03dcdcba7959662b407cb702b58decd041a8f5b6022468e31d143a6c1d593f4b2f8ddcfa38a9d2b68a46721443485f72c62e6eb56840fb1d1b",
    "signer": "0x9765cbE8e26a2c6c4847C1B69ABeB0B5250EC254",
    "userId": "678556080"
  }
}