{
  "manageEntity": {
    "action": "Save",
    "entityId": "1004912165",
    "entityType": "Track",
    "nonce": "0x78b298a020f4e3bc86e56d70bda37834c06fb02ad09d969e66629c5a252bfede",
    "signature": "0x81ab678fb7180de1c6e02a8e85bddce7c788138e2574487aebdb6dc8c963a9920fb5077f818e2f21d055a7aea74083de5413adaa497dd68b3331ef7f4281fff91c",
    "signer": "0xc46f135f7c69C8720C62876570E38B71c1fd1D38",
    "userId": "1438664"
  }
}