{
  "manageEntity": {
    "action": "Save",
    "entityId": "16918",
    "entityType": "Track",
    "nonce": "0xe950fef66ba1a984b1afbab38608b841f02de512ea75d2d9f46a7b9897c64b82",
    "signature": "0x9e9f5f3f172796ef81359c00905177532388cb59d905be46084014a7a4de34470af7d577063dfb9f7fd5b4d69812d55c6b3277c2cffd53d34665c2df01646e6b1c",
    "signer": "0xe5223Dc6E411A24e22DcF917955e97a8D7479d0c",
    "userId": "981716494"
  }
}