{
  "manageEntity": {
    "action": "Save",
    "entityId": "112456644",
    "entityType": "Track",
    "nonce": "0xab250f2e45e0d7f3e572bae7577a9d8b03420c818fd57bfa95455115ef945845",
    "signature": "0x7415b0ec2351b15ce0f7bc2c5e936c039101e4b5dd08392a139d87eff36c893029d5e597e3c07be997c73d33c465d824fa2f67fa9f78244f8c8e66a32a2415611c",
    "signer": "0x73317E9D44b6E1b7d146760b12dc5546Cd140ED2",
    "userId": "683609933"
  }
}