{
  "manageEntity": {
    "action": "Save",
    "entityId": "350572151",
    "entityType": "Track",
    "nonce": "0x2192f129822cb232b2a67e45984c70970a5793778d9859d7bd2c203a98129d6b",
    "signature": "0x2b67863c097b20e05d27e8ac087189465fc1fa3c4fc9b71016351744e8a05f08726d16dddc5f43c929f599c497829b8e36e8509038a8aca656e4b0a4d795250d1c",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}