{
  "manageEntity": {
    "action": "Save",
    "entityId": "53852",
    "entityType": "Track",
    "nonce": "0x9bc3df71d3550e74f08acbd44f99ae6e719e7211050eb4b8332f55fab6c7282f",
    "signature": "0x30b3bb00b17f58e195d29429c3d25ad111e16ca282ace742a36d8ef510030a8d52f14458b66c2430ca7ae28c4eac3514529773af625b578d60ea7025251121b21b",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}