{
  "manageEntity": {
    "action": "Save",
    "entityId": "1757008179",
    "entityType": "Track",
    "nonce": "0xc69936ddb59e208ebf690eee8821fcb264187a9779d3c2a3381c3f4fa3e9503a",
    "signature": "0xa28c18f2aa83ad6caecd5c1157c07ae063026fe66b80f1c8a0bd9b8e857d17ba3dcc6ed0979d9d5f7b049bc707537879946495c04cc952962a239da91b72e1791b",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}