{
  "manageEntity": {
    "action": "Save",
    "entityId": "545552",
    "entityType": "Track",
    "nonce": "0xe71771d05dad591ec8c0c93af1cab2ecb4554057bd20e7dde08a8c144102d9e1",
    "signature": "0xdd98120079607a64be2146586b88e6d2d7409812745cbef0edd53ca72b88bc754ead3ffd05c078cb2a0b3657997a9f4afcad2099b01bbd5798cdcbc71ef8b6721b",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}