{
  "manageEntity": {
    "action": "Save",
    "entityId": "270127111",
    "entityType": "Track",
    "nonce": "0xefc8c52eadfb072a8c43d35a2f8cdd1391722a6277decf955a8cb9fe52826b66",
    "signature": "0xd05e0ed0a644620922564a99508e0ae040bf24b5f477e0f2fca1e73b9356f13b4c5245fdb28bbf1834bd56b52dbd564afddcecbc8aca3b4efb104755ca9bc9721b",
    "signer": "0x2F7db4C1AE3922aD0f32CEdED1870278dd17b64b",
    "userId": "467213409"
  }
}