{
  "manageEntity": {
    "action": "Save",
    "entityId": "1255801845",
    "entityType": "Track",
    "nonce": "0xd2baf23e5522dd42c805c1a037789588b502afcb777e261826227d5efb713fb9",
    "signature": "0x1c2b2f3cf81bc278e39301c750d9b84e02afb995ea9653dc90feb90c5c21013b708a36325f413a74cd04c46226171a9dfdba8b39d987923d0ecd926286bddf6b1b",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}