{
  "manageEntity": {
    "action": "Save",
    "entityId": "1128642119",
    "entityType": "Track",
    "nonce": "0xa2936df142503c79ad18559cdb7fa1ab98aa80fa39c3ef34cc8c81bb9b81a5f5",
    "signature": "0xa7251fe7daed321d932b3d8f8b8aa3347da71e853cc579414c64ec68d4f85881546d1cad410765bd4e61db3384cd48181d4e31c150be965b24a5ae3f409a7f4a1b",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}