{
  "manageEntity": {
    "action": "Save",
    "entityId": "12090",
    "entityType": "Track",
    "nonce": "0x2cd42b1efa5b3dc1f296d5f07445fc6b8e719606a12ac10b29194fa23bacf63b",
    "signature": "0xccb5c93655cf681b5a0621232500e92989a4607cea34ee246055b7620b6fcd0530e3d25bcabc0a1a6134c0154beec3e8f3a59fc15af0418b171e70c4663bf0741c",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}