{
  "manageEntity": {
    "action": "Save",
    "entityId": "1252713747",
    "entityType": "Track",
    "nonce": "0x395d39c4ed7ad890e16a9ab0e27c7c336a77fecd0d0e779079b9222bf5c74f3d",
    "signature": "0xb2dde1aa5dbb84cf86464f925c95fa4de75d98061a806bb717e55c4438cd2c2a5d4ffe7a0be95f94bda9579d01a4d5f3e8f513296aafabd66a065276876f50e01c",
    "signer": "0xF7628Ea36C0C266E289b7538b033fB949A6C31ff",
    "userId": "386745392"
  }
}