{
  "manageEntity": {
    "action": "Save",
    "entityId": "389363606",
    "entityType": "Track",
    "nonce": "0x4ab3985f5eaa0bb843f90c0be99caed82e2b3dc8444d046cdb79742548033f37",
    "signature": "0xca36dd7dac5dcc6decf5dd290766f7aa1e3e17cbe86d87cb81e66d175d28e6d95881676c0f805f80764fc943b55e29dc3a133c3b66237664d23cc4a7504a12511c",
    "signer": "0x6B239e9B75f27b519de7Bad3a26a0b7d30e32D3f",
    "userId": "311257477"
  }
}