{
  "manageEntity": {
    "action": "Save",
    "entityId": "514230",
    "entityType": "Track",
    "nonce": "0x8c491a40d74be218a0235e7edf655e63257689dffdadf1e1b18c343f3f5f3140",
    "signature": "0xeed9327c25968bc861eacbe1fce7bb9eea885ee6aa3263e4ecfc7d6bcfae902e35e72d93764ab49b724199305f7010adfbfc08dc0ac037df15e342448e2cc3ea1c",
    "signer": "0xe5223Dc6E411A24e22DcF917955e97a8D7479d0c",
    "userId": "981716494"
  }
}