{
  "manageEntity": {
    "action": "Save",
    "entityId": "1922610414",
    "entityType": "Track",
    "nonce": "0x776affb736e3a2089a09dfea0928231bebb7fdfaaa62ea4f9121211fba288328",
    "signature": "0x03c7d3a5eddd56187e42ae3209910304738d68155c2ccb857c2883bdcbf9117327472d4b0f2f9a2506a4e5dfa07e4f56e0fb511fa149477cf3c89d478653f9b11c",
    "signer": "0x6068Da6B0a791A756931bE32de98D46eBb95890c",
    "userId": "475275462"
  }
}