{
  "manageEntity": {
    "action": "Save",
    "entityId": "549932682",
    "entityType": "Track",
    "nonce": "0xf4b25dcdbe886f525e6271a4e23b15381a79f883ecfee2f34c28a5d06d17e72f",
    "signature": "0x034038f076679ab8354f18f72312f668318490885f75f4b76e2b662d5b902ca3449ccad0bc3bacca085eacef6b4bf65e99d4080bf69e30bf8bfab83642e549d31b",
    "signer": "0x5abad058d33E1C0C0A69d85BA3181678C1721765",
    "userId": "632918751"
  }
}