{
  "manageEntity": {
    "action": "Save",
    "entityId": "1942940841",
    "entityType": "Track",
    "nonce": "0x8f96b118eed29ce4e76ade55ac7955bafd49ad5a298bbb22a7060c78f1e385ec",
    "signature": "0x0a578ed1bfa85d9c0f0071bce2423fcff6bd700fd7eca44cafd9bece7c4f11ce689446d95c24b6fb9579054e9703db6ba3c1071bcdd57696258ac59a7d6b63d61c",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}