{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "1512749",
    "entityType": "User",
    "nonce": "0x6d866206b551d00ec1ec96211f0fe224e1c95c105c795a197529e1e7c5086eab",
    "signature": "0x8c408ede4093d1421d41d08aa6bc4b8339b7f4a8802e33df80692c23d2236c51590ab45e4d3c8e533f3632855cf1df54a785871996439122f144fd34d6ae33ea1b",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}