{
  "manageEntity": {
    "action": "Save",
    "entityId": "1955699650",
    "entityType": "Track",
    "nonce": "0x60a16dcd9ed2ae4b1224be731f32af28d431fd810f4cd2fb1985c0ede95e4f1c",
    "signature": "0xdf2acbf0d7dda0f3fe3070c207c716f7fb8c70c9a7d7515f4837d2cf2cef44166a6d096e9f7a22ef15ddb9cf88202887d7446ddb0d76534046dbacc8f23a6b7f1c",
    "signer": "0xe5223Dc6E411A24e22DcF917955e97a8D7479d0c",
    "userId": "981716494"
  }
}