{
  "manageEntity": {
    "action": "Save",
    "entityId": "1202019216",
    "entityType": "Track",
    "nonce": "0x2970ccf73c849fc15e70a491679bb3dbc184b5df0bcc381eaabaa68c3982315f",
    "signature": "0xe1ea04b47bfe9d34e14380ee85ff820332a8e45b4a0179658406a53b34d677a574a83b927e4b9ebd3c8a28fa1196f9e9317a45502a7c3d5e8d3245cefb894cbb1b",
    "signer": "0x5452f86EfcB1153FF9C10bdbe4103Ce25434D124",
    "userId": "620307004"
  }
}