{
  "manageEntity": {
    "action": "Save",
    "entityId": "1867662061",
    "entityType": "Track",
    "nonce": "0x69a512ecff01932bc905d6c8ce5fed2c1ffefeb8f8e9bb8b8f0aea7959de8231",
    "signature": "0xd00854ca6acc2cb58d29d0deb83a296419bdc8752c6737562fcbedc1a0755d414b33310d1ee9e2f4ebf9394a80111e524c308e6ea0e5f4324e6137ad027861671b",
    "signer": "0x1d868e2cc29848871636BdCF83a08A975835b6DD",
    "userId": "120328011"
  }
}