{
  "manageEntity": {
    "action": "Save",
    "entityId": "1492072459",
    "entityType": "Track",
    "nonce": "0x88ba17b6b31d151d12626a86114709ce79fb4178ee21712c1c519fe558392f30",
    "signature": "0xecde7c56ea9791287043f716bc51c8d3fa84529995663bb1a07c248981c371ce453c4024394fec7fce31ad6edcae323b7c5bdcc55d5add0ac229b878fb89976b1b",
    "signer": "0x65b2681094e762CAD2349e6C1e2FbC8d54b9c046",
    "userId": "11153747"
  }
}