{
  "manageEntity": {
    "action": "Save",
    "entityId": "123551896",
    "entityType": "Track",
    "nonce": "0x6921ebf039b3f7395f2aea89660a76792af353d19e6366b9d07c8bd9939f717d",
    "signature": "0x80a934ab9dc228826c97c53a528a97fa2fc2b008a5401433d1d376de2343ac9e50f491c6f70ebf2baf4bd8e115004660cc5aac0154dfbaff5e370e285024322a1c",
    "signer": "0x0fe82f565AaE260D57b8e691c61Fb05fE83B6F81",
    "userId": "614212580"
  }
}