{
  "manageEntity": {
    "action": "Save",
    "entityId": "1882989648",
    "entityType": "Track",
    "nonce": "0x22bef0361e691e7bfc66f8e9b90b2a808cfb60da653ae8518130f70a6b116007",
    "signature": "0x81a3622acbda8ed7acf565466e6d3ca61a0fc9906986c4db7f4d4ec127f2455608e78e5b9ac2739ce003eecaef1378cef31d14d3e5bc0a98820f8b8957ad79ac1b",
    "signer": "0xe5223Dc6E411A24e22DcF917955e97a8D7479d0c",
    "userId": "981716494"
  }
}