{
  "manageEntity": {
    "action": "Save",
    "entityId": "1835846624",
    "entityType": "Track",
    "nonce": "0x71d90ac47952a1f1ca2273aa41710a691ea5c1c7a66131ff0a680a80fdea3bf7",
    "signature": "0x235a265388c8da961de3e52d7857c72c6ce4661082390efd2167f906f140331711c941ccf8cf004a1fbeaf38b17b001490f4886d2c1db1b8ab8bddcbb9a370bc1b",
    "signer": "0x43dA66b40816c8fb9e2B0AA77E0643192169AF14",
    "userId": "636236864"
  }
}