{
"manageEntity": {
"action": "Save",
"entityId": "694809",
"entityType": "Track",
"nonce": "0x233bbdcadc4f38b1398e0d68dfd35a9c80e112fe4c1a0cb2829bc68e381e1ec7",
"signature": "0x333f4be6cf14b228d3e6f9b80341a8f7332324e29e145c57935953158646c50b3f2f6cb227a2e5e5cdb7b7bccc35cc709ddd68b1b76a6e32dd1a1b449fa46ef21c",
"signer": "0xa2DaB1ebF6D10325b0948C994b592F7abB2Df44C",
"userId": "728570067"
}
}