{
  "manageEntity": {
    "action": "Save",
    "entityId": "451562539",
    "entityType": "Track",
    "nonce": "0x0be3f0f483986b24d9c9884630d616424c1a11d44139852e6eea2ba206106630",
    "signature": "0x1d4111ac9364258bfdb65559d391a9a3742b00b90dbb143b27287ca3b7f31dd71b84fa5c2f80de86da2fda93024adc0f63ca453bfa34ae07475a74dca35040541b",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}