{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "321512",
    "entityType": "User",
    "nonce": "0x721b871a40f47fedef7928fe0e0a0e31d6e65784453355743e08d5f710d733f8",
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    "signer": "0xa2DaB1ebF6D10325b0948C994b592F7abB2Df44C",
    "userId": "728570067"
  }
}