{
  "manageEntity": {
    "action": "Save",
    "entityId": "1313668416",
    "entityType": "Track",
    "nonce": "0xee57009184f954215dfb470f5f1cb0be61808f8cbd6eed7293d6c1843a4eab59",
    "signature": "0x09c6a1988739c1c31d82bc32354bccd4a6e49ab1e9ed38825696759f3d9453381a23335a8a4031e21fdeb437e58e522cbcf328662987dec50ed2453b0b625d491c",
    "signer": "0xA5fFfA5b8673Fb93490E3F9B0BeE58e1f0Ce1231",
    "userId": "508186998"
  }
}