{
  "manageEntity": {
    "action": "Save",
    "entityId": "1028788033",
    "entityType": "Track",
    "nonce": "0xb186680001a050d9e455e1a30af63cee3ec63f080e29b649b2350fbfa65b5abf",
    "signature": "0x8bec90387035ad32884dc9205c61e6bd6d92c5ce68a0ff736766d0dab2e78f8450431e8ecd6c262f22d869733dd1a91cf77caebb6b69182f82c98dea818c10871c",
    "signer": "0xF7628Ea36C0C266E289b7538b033fB949A6C31ff",
    "userId": "386745392"
  }
}