{
  "manageEntity": {
    "action": "Save",
    "entityId": "2077816337",
    "entityType": "Track",
    "nonce": "0xa48927daf87e41026f03d113c9235ebdded0fc1f929ada388f2036a5bc6964ec",
    "signature": "0x5f1f9546e1401a98bb5d52b0ee06c1750a14b0352d1df369611ff5cb8b7851ab73e25ca95861017011e042cd70c9a4be4b0cac43f003003553b2866fb8ec81311b",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}