{
  "manageEntity": {
    "action": "Save",
    "entityId": "1789783469",
    "entityType": "Track",
    "nonce": "0x1a69b2a26323297dfde5365b5725a7a1bc12c76f2aac9f3476af8c2432540ea7",
    "signature": "0x60bdf203f57bcf7361dad81ab57558d79196c02304f379f7e31b0ebcd55e2e7801e07d0c82dec77346282550891e06288bdb51333ea6090b20a94050549dfa061c",
    "signer": "0x84B42609E987DD0953e02498E61987fB833B7C92",
    "userId": "887547386"
  }
}