{
  "manageEntity": {
    "action": "Save",
    "entityId": "1204045169",
    "entityType": "Track",
    "nonce": "0xe7a6f30b2c3a0b436dc82e31660ffb28e901afdbf1bc1c68228ce60044ec11a1",
    "signature": "0x8c2e868431d9181be2984b6de586b4ae43c786cd573476eeda84b10e5427264e1c2e568c4ed27870ab12de142c42671958a336f6a41086a1c22dbdba0e9324c31b",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}