{
  "manageEntity": {
    "action": "Save",
    "entityId": "444401",
    "entityType": "Track",
    "nonce": "0xa18d1affc6ac015814981e240f8ead3661dd403f1c004e2b0b8814766d67c2dc",
    "signature": "0x8c22714bba7046a45c6e8e206b062e68f167abdf9f009d34b75002734fef196b04b3b269a833a5a841671c9703ec6bcead58df08361ba4739c67ad85b14b411b1b",
    "signer": "0x44577d90A171E208f723dEEa39019067c9Dd87E8",
    "userId": "853591809"
  }
}