{
  "manageEntity": {
    "action": "Save",
    "entityId": "1389169616",
    "entityType": "Track",
    "nonce": "0x998147ff59848bdfd9f9142ec4ca6d2f7f188c4ec0bc2f06757a4d28a9e8fb27",
    "signature": "0xc8ccd238ea30697e865b9347bc1c45695bdabbcedf5893961db94306cdaacce77e4a11a45675d56d91541ee0c92fd749abbc90aa46aea252e531ca2ef35227791b",
    "signer": "0x811B619477Ea800Cc8e7fDd08cEA323eC3E06411",
    "userId": "791433195"
  }
}