{
  "manageEntity": {
    "action": "Save",
    "entityId": "51356",
    "entityType": "Track",
    "nonce": "0xa3c5aa29210554df6b26c0472ebea38c9d6b154872e52322141edaf20f4d51f7",
    "signature": "0x5498a60d4f8fd5ec832205a6b65834621d038062b5e65ad92a1caa869126b8a560a060426a1675da18e6c9d3900afc76590b776e853eab4b60146407a194790f1c",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}