{
  "manageEntity": {
    "action": "Save",
    "entityId": "779536426",
    "entityType": "Track",
    "nonce": "0x118f6b9bfc6aa7c743dbdf8955babb4d9591f7553a8b1a0df811d7d159f67fb3",
    "signature": "0x6f51010046246be75d0ae7543fc8af51359f65f75cfdc40aabd2ef0575314f8e2b3c05b23d0f302648baf51e2001c3a247656495642d8ee0ca14263079a371a31b",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}