{
  "manageEntity": {
    "action": "Save",
    "entityId": "1580968534",
    "entityType": "Track",
    "nonce": "0x76820c4883808220c18ae5cc449cef7a1c94b1a2187b7e9ea6d7e04b0247f7c3",
    "signature": "0x593ed4c3512c53b47a3bafd11c9f6bcea57ad466574c825f23b22a3ddf9d13df277702333041aef183d12926ccdf80a1e6ae370854a03c6c20066ff9f00ca57b1c",
    "signer": "0x5452f86EfcB1153FF9C10bdbe4103Ce25434D124",
    "userId": "620307004"
  }
}