{
  "manageEntity": {
    "action": "Save",
    "entityId": "1447979955",
    "entityType": "Track",
    "nonce": "0x942dbe25dcb056509d881bd39ce5d479d92c532982d705ecd340dd2f3e2eae1f",
    "signature": "0x842ab8a1aadcef81c5c11823b8f9f2e0b1708ac565564ce3601c312aaf872538014b85094a4a3d2c296563d60fc5d1b3e53ceab6e57e5bd2e690fed1a6845e151c",
    "signer": "0xe5223Dc6E411A24e22DcF917955e97a8D7479d0c",
    "userId": "981716494"
  }
}