{
  "manageEntity": {
    "action": "Save",
    "entityId": "553651",
    "entityType": "Track",
    "nonce": "0xcb6a5d0ba01e9a6ff0287493f3f92e22c7a6b90c31da1e58c49c5cbafefcc9ce",
    "signature": "0x760bdd0665f859cf6c42ee4130625c86ca98e9ba31ee62d54f7af49791805a3f64600bde6422b97e24db46d236de4b6f23b800747ffe882b26366307df5fca3b1c",
    "signer": "0x5452f86EfcB1153FF9C10bdbe4103Ce25434D124",
    "userId": "620307004"
  }
}