{
  "manageEntity": {
    "action": "Save",
    "entityId": "1534894684",
    "entityType": "Track",
    "nonce": "0x7d803ead6d5befb22bbe1b0cc90f24d060139d5c2097c409d0fad2cfff7f8312",
    "signature": "0x5b8221a68e7bf5010e6323561ac534bfc66783e459a8bb1b87c14876c2c2644f2720e193ed116840261838bde531b598487f909670816023fac42671389aa8df1b",
    "signer": "0xe5223Dc6E411A24e22DcF917955e97a8D7479d0c",
    "userId": "981716494"
  }
}