{
  "manageEntity": {
    "action": "Save",
    "entityId": "1048288751",
    "entityType": "Track",
    "nonce": "0xfd95a8246bb533feb7ca85e12888cd60b00340f4e29ca8933401ebaf5a9a586c",
    "signature": "0x183539078687debcfe9ead76618e9195318352931a048449045248d61ce0dbbf49e978d53af09deb6c7602065329bcd9503d8518cf13c70f66da83f33b6c070a1c",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}