{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "1898740",
    "entityType": "User",
    "nonce": "0x4f515fbab00965bca4be20aa158ea60108a3e95436fd483eef3d678f09d5b164",
    "signature": "0x523a0851502038b172cbc2c943c09188fe5b53450f871cf5ab28d01697785c5605c5cbad4fa75801c1cabf5fef4819646206b0d2739bee2dd70ea1994e4f98951c",
    "signer": "0x2D566E1DaC6fc148a694abe846B32e39B6584aa5",
    "userId": "890889753"
  }
}