{
  "manageEntity": {
    "action": "Save",
    "entityId": "191959",
    "entityType": "Track",
    "nonce": "0xfac4d9399e1efa2d2142b51b90e2e39c39517aa0f1d8a272ae594bd15b4d1892",
    "signature": "0x11cfecd0f6c20659a8553b7bc100620f8a7b4a607c54a8ea0b715065a702b9d4416c70b87709304c7b69df73f4710cd2b054ff882d85183fcae3199c15c40f651b",
    "signer": "0x43dA66b40816c8fb9e2B0AA77E0643192169AF14",
    "userId": "636236864"
  }
}