{
  "manageEntity": {
    "action": "Save",
    "entityId": "952959",
    "entityType": "Track",
    "nonce": "0x19f499b4cfef98f7bb2fca57f38175978aa0b4ed39a186f67d76ab980e7769ec",
    "signature": "0x6b4f9c9fac8a76e0937bc794273ffa51edbd908786b9ea24955f1c589086cba963c1253fe3461c0b68f745f6c6c5f6b20417cb23f54265e805f6684153c5006b1b",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}