{
  "manageEntity": {
    "action": "Save",
    "entityId": "736096758",
    "entityType": "Track",
    "nonce": "0x7da2b666a610bf3c6184e603427cb1c74d72202f209dafe17788039f0172ac92",
    "signature": "0xb0a960fd567f20160fd269f056f637987c9365a26300106bcf5a6cdc3dda3de1549745fa8d0456282cb360c9aabe5e454f44246dc17662113d09363eb14753261c",
    "signer": "0x767f09338Ac6CE8645c0a76a17a560429b582132",
    "userId": "520958130"
  }
}