{
  "manageEntity": {
    "action": "Save",
    "entityId": "966734491",
    "entityType": "Track",
    "nonce": "0xc005b3e7ec1440b0a3e08320198ef6f92374cce41c475b1822b411e6d71d8a49",
    "signature": "0x175f8598e167a7aa53aead89f5c068350ce72bc032f7c4eacab833ed2bd945331d1078e7145d7964ea8160ff603c2ffe3eacf0d120d6ef129775bf23dd7af8c11c",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}