{
  "manageEntity": {
    "action": "Save",
    "entityId": "340070",
    "entityType": "Track",
    "nonce": "0x2c4e1df2e56a751f01b879b0bbb400c0d70cf00fe1442e2014def7796f557531",
    "signature": "0x1cdcacd6d3124f082792d6b90f9e8178dd939fae3868c13817820c82f632d037579ab92cf0b02ecbba86900226319e611b93886be284292b5dc7876aa89aa3d01b",
    "signer": "0x7eBAab495a64FAea1f04dc59ff804bf939da7B12",
    "userId": "709077025"
  }
}