{
  "manageEntity": {
    "action": "Save",
    "entityId": "1625629426",
    "entityType": "Track",
    "nonce": "0xd6a4ef900deb07ac2454d89d16583dcbc3b7b0566ff31702b529224b0c9eba39",
    "signature": "0x9faccb3c62975028764e1454b04f54d3844796232cf53cdb67065db5bef2beb03c07c6ab01fa256756713ce13ded0e6ee6f436e126d88ca69c30df7f249ab4711c",
    "signer": "0x44BAdCFCf42113CbB67f519e4efa576B336f9bf7",
    "userId": "136844578"
  }
}