{
  "manageEntity": {
    "action": "Save",
    "entityId": "101274936",
    "entityType": "Track",
    "nonce": "0x0403c202c28a8e41c219aaa7e25d84afd3dac8c22f970c129094d3838aff5ead",
    "signature": "0xab43da1dc132d2ed857edaad7aa4e7ea99d7fc4f90cf6cfab9220caa851ee2771389c6f73dfd8a581faab1cfbf5679c114cf0fd0c2cd817cd022843be86370141b",
    "signer": "0x6754A920da1003d0904BdFf228A6E217Cd12bF5E",
    "userId": "105562689"
  }
}