{
  "manageEntity": {
    "action": "Save",
    "entityId": "994381",
    "entityType": "Track",
    "nonce": "0xc4552dd8d8e02132e85cea017bf32b9761bf3f92b46dbe9e60d0c01e80369f50",
    "signature": "0x61dddf95673d2bcdd3e720774c266576a547257218a3baec0788aa214bd0182332ffb51a2f6d258d0678b28cdfd2c84283eb40c611c3b3f80956dffc672146f31b",
    "signer": "0xbe916820AF010608151C80f3A74F7c83218094B2",
    "userId": "881446128"
  }
}