{
  "manageEntity": {
    "action": "Save",
    "entityId": "1190026529",
    "entityType": "Track",
    "nonce": "0x5c59708d8b5959c2ac55dba8b2018423e9bfb7009e08224dcb29c36b93acbc7b",
    "signature": "0x815f1db45c15550ba0ebd0e8dc7c8f467276cbe997d19c6ec5d43c3c0ea5fc5c152c4f55fd7aa77d2ec68518399fda0808e8c63dc60d86c544538f72284ac6311c",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}