{
  "manageEntity": {
    "action": "Save",
    "entityId": "1501231995",
    "entityType": "Track",
    "nonce": "0xd7a086bc95b3d4991a2bc01b8de92314acc4e384b471cc7266c0b0ee2e999b12",
    "signature": "0x6ab713faca058fe51ab14e7e71706178c9ca812ee72f364b698de4c3489f9e74128525059ea0dc518d6e8282768d21059c8a8dfde098a80fab0cfba16c3676f51b",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}