{
  "manageEntity": {
    "action": "Save",
    "entityId": "2118475501",
    "entityType": "Track",
    "nonce": "0xe9de2a53ca9e5094ca6b63ac3c069b6e1869261500e6406d22bea6620ab4a158",
    "signature": "0x55c49b51a4294b55aab5fd572edb9f9c9fc1c8d3d9a44d34314b13341e3e5b4d3cf88c7717176f111675fab18d98bb423e11c1cba98ec971fbb70f7557aef33f1c",
    "signer": "0x5452f86EfcB1153FF9C10bdbe4103Ce25434D124",
    "userId": "620307004"
  }
}