{
  "manageEntity": {
    "action": "Save",
    "entityId": "700404470",
    "entityType": "Track",
    "nonce": "0x8b98eb5715d7b73c4d8bee08d857a6ea3646bd471bae8b3ceff7e89f95dabb98",
    "signature": "0xaec751d444370504fabd8a13aec29399a9aa1cfc5db5ba6476556aabb804b6ce1c1f2eecee48f30346d94abf9e2ea98bd790832608ad96438e566d6a185d0e891b",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}