{
  "manageEntity": {
    "action": "Save",
    "entityId": "1812174606",
    "entityType": "Track",
    "nonce": "0x3ab011dc16f5ae5fcb68e0a1e224f0188d2ea268effe30978667e0f02e094c59",
    "signature": "0x3a8804b0e15420780928988c8004052152770142c345ac8a7a88c0ecab896cf22bb1dece0d6a7421fc19209a11952b4f4aff9d1d6a88704f0d016ddc5215fcec1c",
    "signer": "0x5452f86EfcB1153FF9C10bdbe4103Ce25434D124",
    "userId": "620307004"
  }
}