{
"manageEntity": {
"action": "Save",
"entityId": "252575",
"entityType": "Track",
"nonce": "0x2e9f1db6d68389a0fab17906af3e7a7cf98f0e65e9cfbabd92d21a1019ba1089",
"signature": "0x1345b9a24e5c6ca2d525fea7d569022794990a0d3477411dca89f84dfebef7a12bfb9adc82de01b6f220c05730060eb974d883849942634d81ff2c59ec7bf30d1c",
"signer": "0x3D4d8a781454E2338c482dE697d6DE1ACc7D9031",
"userId": "599751364"
}
}