{
  "manageEntity": {
    "action": "Save",
    "entityId": "50336484",
    "entityType": "Track",
    "nonce": "0xf86c82b1f1902982d0460a0e48ec63d4828b927df115e10b03be6f04c49a46f8",
    "signature": "0x5b31fa7915707ea9c95c71a7097f6dd4ddca695619b0693945376fd617b0970b426996eacdb05535a5c5e16b97a4b80a7d27393e006c2db25dc10976f2f033b91c",
    "signer": "0xC6f6979d7215C4611Cd7aDb30a42B2812294262c",
    "userId": "55290787"
  }
}