{
  "manageEntity": {
    "action": "Save",
    "entityId": "1307126296",
    "entityType": "Track",
    "nonce": "0xc653d0dd3d38f1bf7f039547cb3ca9fad0eaf855287446eae748bc2845214f81",
    "signature": "0x51b90e899f73e0ea4d3ed9471b25e37fb920634f594b58863f0f3b7e2bdb00d8229c6088eaaa59be678f2910f2231342f3aa2c13cbd637f416bdd9624035bfa21b",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}