{
  "manageEntity": {
    "action": "Save",
    "entityId": "880186",
    "entityType": "Track",
    "nonce": "0x7427cbe12c0f2fd09d79cd9b3b296f1613e39d23fc5d9194d7bbd4f860fad035",
    "signature": "0xdbfbca72b8c11906bbb196283d13e65032bd49aa836850736e5e1773ef0fe800075bfd3d29298f552ff78eb881a7777b8dbbc8646011119095ae3804048b3aa21b",
    "signer": "0x629256a8696F1C3BF59aD9204C3Aa4dC8bc4C07d",
    "userId": "871265631"
  }
}