{
  "manageEntity": {
    "action": "Save",
    "entityId": "1507285895",
    "entityType": "Track",
    "nonce": "0xe93c3c4b3125b52f246a1ea65fb580a55ce43fed24d5a812ef49a30df155c5f4",
    "signature": "0xc51aa14595556901733b42af955a87ff43d4eff7d74d17e0ab06dadad2a1e4354899f07d155e8102574894c5300912f459fe281a6a42b2e82ccfca1b3c4892a61c",
    "signer": "0x036B1ee0d2003ae5B5E252d58647d13f0e588EEB",
    "userId": "161353174"
  }
}