{
  "manageEntity": {
    "action": "Save",
    "entityId": "1480945475",
    "entityType": "Track",
    "nonce": "0x2669c43feb53dfde54934f9f131d7a8d1bf583e140bfcb2a141002c627bf56fe",
    "signature": "0xdcfc7474731cd76ed1460cd777e4ba3b6caab532570b1dc1b1a378fd7d41be232e927d0db27bcff479f59799a948678e184787ff8387e6ac7637af5c18c331d41b",
    "signer": "0x5452f86EfcB1153FF9C10bdbe4103Ce25434D124",
    "userId": "620307004"
  }
}