{
  "manageEntity": {
    "action": "Save",
    "entityId": "293472",
    "entityType": "Track",
    "nonce": "0xb13893cf0c9e44fcb41c3fb64342edb07ee150fac23434f4aca96a5a816c6cb3",
    "signature": "0x3b893b214ea30580b6846cccd6bd96a4e4b38f78d65e5fcf861a180c3372bebc3032eb3781f7449292a827c7f32151270201247ed817509f65e763c44782a4be1b",
    "signer": "0x44BAdCFCf42113CbB67f519e4efa576B336f9bf7",
    "userId": "136844578"
  }
}