{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "508263176",
    "entityType": "User",
    "nonce": "0xcd3e26352c1d7444e636dd3af6cf45c29363295c1600793da48cb334784b7d77",
    "signature": "0x29ce56f77f796b0f53fb8bbdd8e71fc59852d301e30c38101d0c38c2d0ca300427e45f75ef94a89edcdb95577df1b55f324aa337bd205fad8c20f34716f0b2ca1c",
    "signer": "0x712Aca9aA6ac07F98dcEC338Be9C15c3Dc47d569",
    "userId": "12730129"
  }
}