{
  "manageEntity": {
    "action": "Save",
    "entityId": "2119944392",
    "entityType": "Track",
    "nonce": "0x1df17466619ba6eec97924ccccf05118e7bdedb1c14a3ab22308384db67d64a0",
    "signature": "0x85ad8be5253e85510fa55b67aacb420c97606d9b111a888541d0ed18cca95fc93cd2f4c923878cbddd0ac6715668e1956b911ec16b88cb16ecaa9c90bd4d3f641c",
    "signer": "0x53d8e61f7BdCd69E26B5AAe8F197464091224DB4",
    "userId": "99786"
  }
}