{
  "manageEntity": {
    "action": "Save",
    "entityId": "1961821551",
    "entityType": "Track",
    "nonce": "0xc176c042e614fc757fe71677f729a073b8667beb8da325ae710564a3d961f1f0",
    "signature": "0xf9319e8df8c460aba6369bddee0ef009cb2bcd1e25ceef125216c11c6cf6f427641dae746a53094e8ae391f3e2de01b0846fb4e938b4c50c7130fc12234a5edd1b",
    "signer": "0x6754A920da1003d0904BdFf228A6E217Cd12bF5E",
    "userId": "105562689"
  }
}