{
  "manageEntity": {
    "action": "Save",
    "entityId": "911",
    "entityType": "Track",
    "nonce": "0x143f8a11137bc8354fb8c6b7009dcdcd5d2c6dcaccacffb6b600ba21d4b82285",
    "signature": "0xae2d95093123ba4854086456ba9db46d4eafbeccb35d3f263a55fad593c982f6730a2c430449d4eedf6ec2b2e7fcb519a7cbd6cdf506dbe07609117d82a977b61c",
    "signer": "0x27204C77Baa4a510c92A96A4ba3661CC53EE568E",
    "userId": "35918963"
  }
}