{
  "manageEntity": {
    "action": "Save",
    "entityId": "2119212222",
    "entityType": "Track",
    "nonce": "0x6cdfc0781cab7cc711c441a9d38040a19a4ac9a9d7afb431e6250218e2604524",
    "signature": "0xf9c229d00275d200ab21e4c1ab16b5afe369c03f131b20318283e399a1f5cc5b3e5485664957ba64fb8980aa2ed94ec1bc5e4bec5498c4dce20e428ff9c1df721b",
    "signer": "0x44BAdCFCf42113CbB67f519e4efa576B336f9bf7",
    "userId": "136844578"
  }
}