{
  "manageEntity": {
    "action": "Save",
    "entityId": "979146097",
    "entityType": "Track",
    "nonce": "0x98c522d63cae1385f6584f0d52d23c5cb87e8e9928124676db8118ea45dfadfb",
    "signature": "0xc5915ac5ed5936579f08084a210154e44bde4841fdea1fd82ce70443fb179933637ecfaa8b99988379fd3ada82e8d712f2fd493bc608fdf8db5936e4c04bf1f51c",
    "signer": "0x2F87bb373089af6C75e3362077A0E52A4779f72c",
    "userId": "582715056"
  }
}