{
  "manageEntity": {
    "action": "Save",
    "entityId": "539061232",
    "entityType": "Track",
    "nonce": "0x6388b8ed10ef35d0c58da0de07c9c894142de576b985178ac0a419dbce35ea38",
    "signature": "0xb70f52124623a4bf64460bbf0409958d42ea2f4541f68d521f4cf6df28df832156d5d0d83e83152afec77fc09b1ade45c9943f861ae79439c4cb0bdc60582a6a1b",
    "signer": "0xF7628Ea36C0C266E289b7538b033fB949A6C31ff",
    "userId": "386745392"
  }
}