{
  "manageEntity": {
    "action": "Save",
    "entityId": "622234411",
    "entityType": "Track",
    "nonce": "0xf5af166c78dbcfb86c8046e0c5a3782c8f81a2eed0771d4a76a515cebb955f16",
    "signature": "0x9210a1d7d999c2b160289c3842cfcca02d330e940b1927bbdb77c95dab1337557e1002d6e5eba38213be5af1c4534d3316c02b45e5b5ae218dfacce1a74ca5601c",
    "signer": "0x5abad058d33E1C0C0A69d85BA3181678C1721765",
    "userId": "632918751"
  }
}