{
  "manageEntity": {
    "action": "Save",
    "entityId": "1825209037",
    "entityType": "Track",
    "nonce": "0x52f37983a1e976e76341d5a67ad2bbaee5f36e422e67971445b163660786bcdf",
    "signature": "0xbf5cc1cb5fa1d4974d35ddaa2d6f98b01864eb0d76767a69a3436ccca8225a4d0ef70d08dea411b4890c9e36ec0a4010fb45d7b6487aa0b48d098addd22ab0821b",
    "signer": "0x43dA66b40816c8fb9e2B0AA77E0643192169AF14",
    "userId": "636236864"
  }
}