{
  "manageEntity": {
    "action": "Save",
    "entityId": "1415238841",
    "entityType": "Track",
    "nonce": "0x2d59540dd2447913a575ce0b77ea3a07ef60afec1c6dd7f6eeba793423451e66",
    "signature": "0x4907fef94f6cf810bbee4410ed0f90d3f68da2ec5af7bb31ed29bfdb2a162b002ddaf91a5acdb93357af4b20f401672fa61e7f6f6839a2538a586c5ee2d639971c",
    "signer": "0xe5223Dc6E411A24e22DcF917955e97a8D7479d0c",
    "userId": "981716494"
  }
}