{
  "manageEntity": {
    "action": "Save",
    "entityId": "914968765",
    "entityType": "Track",
    "nonce": "0x37bfa7b7b5c2b83b3d890d13d6254ccf153412a375f4e7da12974b808d91f5dc",
    "signature": "0x084f36c3e4693a348cfb994197239d264725325a6253e1ff86c23225519bce4c4ed5e84ac1dd67982fa51dddb831a4786d982b87c076c5feca53287ec45de5941b",
    "signer": "0x796D60E9fE921C82Ef20f6329e27dD246392f542",
    "userId": "809803"
  }
}