{
  "manageEntity": {
    "action": "Save",
    "entityId": "18041",
    "entityType": "Track",
    "nonce": "0x32a8b73cd44f421f3b62ac9e916e0077ebc59534fe9c749ce3395ad505f9597b",
    "signature": "0x99f5bc6b363b0e54070a7e962c554e0fe2571602521213e5b8b03e5b2431ea195415b8b4c4d50016aad12fc7973b0c135c5e9bbe3cb310b1d7d2c836f188ed111c",
    "signer": "0x7141B2A3008b70b734Eb2A6580f1F2be92aADf33",
    "userId": "303445"
  }
}