{
  "manageEntity": {
    "action": "Save",
    "entityId": "738244",
    "entityType": "Track",
    "nonce": "0xf09871a1af5ebcec8eea8b6b8c820d4da7038b08941a30371fda68a55739f68f",
    "signature": "0x323ade3d109875d25cb28dc96d039cc54b4109ee974ac14ee53166f4b833f18a4609b2e2444d7b841007b208cd0be959e83585f5e66d931814c4155310c75a091c",
    "signer": "0x44BAdCFCf42113CbB67f519e4efa576B336f9bf7",
    "userId": "136844578"
  }
}