{
  "manageEntity": {
    "action": "Save",
    "entityId": "544162",
    "entityType": "Track",
    "nonce": "0xc8a71dde9ea33e15761b8125754e289e81ce4cf45d6b02f71ac1c7e145a29da0",
    "signature": "0x53148d890edd24ff4277d734e8bf9be505461b0e8e38f4d65773d9bdc2ea2e932ddf91cc17f3ad7e3d0d0cc9aeefb66d738a9d9e31a742915fcfef5a895c30e11b",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}