{
  "manageEntity": {
    "action": "Save",
    "entityId": "1490519874",
    "entityType": "Track",
    "nonce": "0x165a10734d4dd29fc15b8be7dfbdc9d32c0d05bc4637f7353b06ca2e11edf40d",
    "signature": "0xfbaeae6271324da21ec04a7b3a28584dc5b43f8ab52c3c1192db6380d0b725f4275669faa53a99b791a35373f50da37bd8f48ce68e1fa517c2bf3d80db54479c1b",
    "signer": "0xe5223Dc6E411A24e22DcF917955e97a8D7479d0c",
    "userId": "981716494"
  }
}