{
  "manageEntity": {
    "action": "Save",
    "entityId": "1441365431",
    "entityType": "Track",
    "nonce": "0x279e35675ca186ebeaab76f42ca3721330ed2a39d23db33c419c18134ae2d343",
    "signature": "0x6742aac7d81d9b4d72218091534d684d94e9a7259b12b33739685941721c976d1e0eb0c2f7a79b0c7ca2e8e2e59fb9ea39964de2f0329b211bdef7434788e56a1b",
    "signer": "0x90CBf7c9BBF688fd9Fa4029B96e1BC32b270cA24",
    "userId": "711459379"
  }
}