{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x4a1d7648765871449535be3998ca3ce7ce1065b142293b4af31e1062ec7cddb6",
    "signature": "0x144c6da549044b66dadb387d725f926db627c5c0ddfaa5d1c5dc4964248b2c8619ebc90afd848cb90579f71e1a31a0742b4c245d31f733cad1cbd6fb7b1ee5ef1b",
    "signer": "0x5Ed82350F9b842a704EF21b810d52cd4A8753A4C",
    "userId": "16412261"
  }
}