{
  "manageEntity": {
    "action": "Save",
    "entityId": "1047109",
    "entityType": "Track",
    "nonce": "0x724b5e8671c592b19914ad1cd6ed4e1463c1f58f9baae379f1fb9f0058422b62",
    "signature": "0x8a49430ce4124242197f68a2324ce4a2e70c673f25c1eab699d3a44532d9cf2f3940820de6d58eb2c346dc168c05ed2a620db642471a8fd09403744026d7c5581c",
    "signer": "0x44BAdCFCf42113CbB67f519e4efa576B336f9bf7",
    "userId": "136844578"
  }
}