{
  "manageEntity": {
    "action": "Save",
    "entityId": "422762",
    "entityType": "Track",
    "nonce": "0x8885584c8622a733a0fcc2ce6ae7fdeaed6f29536f5bdb159dfd0c3842f775b5",
    "signature": "0x9f00e2bb641be643f6646f621fb5052b2ef47ee32da503486cdcfb98b58931a437b5baa76a18f3d2b5c2a50223931f20c2b0727af1e25ffbfbc836e47ef0b6031c",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}