{
  "manageEntity": {
    "action": "Save",
    "entityId": "1339139491",
    "entityType": "Track",
    "nonce": "0x454cb32982895fc03d91badbdaca9f68623ff2504f38b5d150aea0dd267b1bc8",
    "signature": "0x55c8ee0ba1b5ab121d4f020cf0b8e603c7a900ff78def79fc1922059c72509492b2011cc32c875260619eb8b45af32b102cc18c9bdc82fbeee22dcbc35de26371b",
    "signer": "0x283a6Fd0bE176865B404dfc3B2805D3a2701d62e",
    "userId": "484365174"
  }
}