{
  "manageEntity": {
    "action": "Save",
    "entityId": "250939",
    "entityType": "Track",
    "nonce": "0xd09b500a07df20a75b752dafc9a5d0711552d55a3e6aa2e9d2abe313f3335620",
    "signature": "0x34a404eb7aaf20302de100b92b9a7bb94ccc682ee6a3b61c9a082406a96c61257f0b6f7111a9fcb0e426a27413716e40e03ce7fe0bc13e1d66648075db1d054c1c",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}